Which of the following sentences is grammatically correct?

Question

Quizplus · Accepted Answer

This sentence is grammatically correct. We use "neither … nor …" when we want to deny both possibilities. Neither is always followed by nor, whereas either is followed by or.
Neither apartment were available for the weekend.
This sentence is incorrect. Both neither and neither of are followed by a singular verb.
Neither boys had seen the dog.
This sentence is incorrect. Neither must be used followed by a singular noun.
Neither Sarah or her sister have a library card.
This sentence is incorrect. Neither is always followed by nor, whereas either is followed by or.

Which of the Following Sentences Is Grammatically Correct